Facebook chief operating officer Sheryl Sandberg will meet with the leaders of the U.S. House of Representatives Intelligence Committee behind closed doors on Thursday, according to three sources familiar with the situation.

Sandberg will meet with Representatives Mike Conaway and Adam Schiff, who are leading the committee’s Russia probe, the sources said.

Officials from Facebook and the committee did not immediately respond to requests for comment.

The meeting will take place as several major internet firms find themselves on the defensive in Washington, amid renewed scrutiny about how Russia used their platforms influence the 2016 presidential election.